Faults Cause
301
Operating temperature
too low or too high
401
Hardware failure
Maintenance and cleaning
The product is maintenance-free.
CAUTION! Never submerse the product in water
or other liquids. Do not allow any moisture to
penetrate into the product during cleaning.
Clean the laser beam output opening
receiver lens
case of more serious contamination, remove the
dirt with a damp cotton swab. Do not exert any
strong pressure!
Never use petrol, solvents or cleaning agents that
attack plastic.
with a gentle air stream. In the
1
Solution
Pay attention to
the correct
operating tem-
perature range
(0 °–40 °C).
If the icon
appears despite
repeated switch-
ing on and off,
take the product
to a specialist
workshop
and the
2
GB/IE
37